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Date: Wed, 3 Jun 2020 16:36:23 +0200
From: Jiri Pirko <jiri@...nulli.us>
To: Vadym Kochan <vadym.kochan@...ision.eu>
Cc: "David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>,
Jiri Pirko <jiri@...lanox.com>,
Ido Schimmel <idosch@...lanox.com>,
Andrew Lunn <andrew@...n.ch>,
Oleksandr Mazur <oleksandr.mazur@...ision.eu>,
Serhiy Boiko <serhiy.boiko@...ision.eu>,
Serhiy Pshyk <serhiy.pshyk@...ision.eu>,
Volodymyr Mytnyk <volodymyr.mytnyk@...ision.eu>,
Taras Chornyi <taras.chornyi@...ision.eu>,
Andrii Savka <andrii.savka@...ision.eu>,
netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
Mickey Rachamim <mickeyr@...vell.com>
Subject: Re: [net-next 3/6] net: marvell: prestera: Add basic devlink support
Thu, May 28, 2020 at 05:12:42PM CEST, vadym.kochan@...ision.eu wrote:
>Add very basic support for devlink interface:
>
> - driver name
> - fw version
> - devlink ports
>
>Signed-off-by: Vadym Kochan <vadym.kochan@...ision.eu>
>---
> drivers/net/ethernet/marvell/prestera/Kconfig | 1 +
> .../net/ethernet/marvell/prestera/Makefile | 2 +-
> .../net/ethernet/marvell/prestera/prestera.h | 4 +
> .../marvell/prestera/prestera_devlink.c | 111 ++++++++++++++++++
> .../marvell/prestera/prestera_devlink.h | 25 ++++
> .../ethernet/marvell/prestera/prestera_main.c | 27 ++++-
> 6 files changed, 165 insertions(+), 5 deletions(-)
> create mode 100644 drivers/net/ethernet/marvell/prestera/prestera_devlink.c
> create mode 100644 drivers/net/ethernet/marvell/prestera/prestera_devlink.h
>
>diff --git a/drivers/net/ethernet/marvell/prestera/Kconfig b/drivers/net/ethernet/marvell/prestera/Kconfig
>index 0848edb272a5..dfd5174d0568 100644
>--- a/drivers/net/ethernet/marvell/prestera/Kconfig
>+++ b/drivers/net/ethernet/marvell/prestera/Kconfig
>@@ -6,6 +6,7 @@
> config PRESTERA
> tristate "Marvell Prestera Switch ASICs support"
> depends on NET_SWITCHDEV && VLAN_8021Q
>+ select NET_DEVLINK
> help
> This driver supports Marvell Prestera Switch ASICs family.
>
>diff --git a/drivers/net/ethernet/marvell/prestera/Makefile b/drivers/net/ethernet/marvell/prestera/Makefile
>index 2146714eab21..babd71fba809 100644
>--- a/drivers/net/ethernet/marvell/prestera/Makefile
>+++ b/drivers/net/ethernet/marvell/prestera/Makefile
>@@ -1,6 +1,6 @@
> # SPDX-License-Identifier: GPL-2.0
> obj-$(CONFIG_PRESTERA) += prestera.o
> prestera-objs := prestera_main.o prestera_hw.o prestera_dsa.o \
>- prestera_rxtx.o
>+ prestera_rxtx.o prestera_devlink.o
>
> obj-$(CONFIG_PRESTERA_PCI) += prestera_pci.o
>diff --git a/drivers/net/ethernet/marvell/prestera/prestera.h b/drivers/net/ethernet/marvell/prestera/prestera.h
>index 5079d872e18a..f8abaaff5f21 100644
>--- a/drivers/net/ethernet/marvell/prestera/prestera.h
>+++ b/drivers/net/ethernet/marvell/prestera/prestera.h
>@@ -11,6 +11,9 @@
> #include <linux/notifier.h>
> #include <uapi/linux/if_ether.h>
> #include <linux/workqueue.h>
>+#include <net/devlink.h>
>+
>+#define PRESTERA_DRV_NAME "prestera"
>
> struct prestera_fw_rev {
> u16 maj;
>@@ -63,6 +66,7 @@ struct prestera_port_caps {
> struct prestera_port {
> struct net_device *dev;
> struct prestera_switch *sw;
>+ struct devlink_port dl_port;
> u32 id;
> u32 hw_id;
> u32 dev_id;
>diff --git a/drivers/net/ethernet/marvell/prestera/prestera_devlink.c b/drivers/net/ethernet/marvell/prestera/prestera_devlink.c
>new file mode 100644
>index 000000000000..58021057981b
>--- /dev/null
>+++ b/drivers/net/ethernet/marvell/prestera/prestera_devlink.c
>@@ -0,0 +1,111 @@
>+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
>+/* Copyright (c) 2019-2020 Marvell International Ltd. All rights reserved */
>+
>+#include <net/devlink.h>
>+
>+#include "prestera.h"
>+#include "prestera_devlink.h"
>+
>+static int prestera_dl_info_get(struct devlink *dl,
>+ struct devlink_info_req *req,
>+ struct netlink_ext_ack *extack)
>+{
>+ struct prestera_switch *sw = devlink_priv(dl);
>+ char buf[16];
>+ int err = 0;
>+
>+ err = devlink_info_driver_name_put(req, PRESTERA_DRV_NAME);
>+ if (err)
>+ return err;
>+
>+ snprintf(buf, sizeof(buf), "%d.%d.%d",
>+ sw->dev->fw_rev.maj,
>+ sw->dev->fw_rev.min,
>+ sw->dev->fw_rev.sub);
>+
>+ err = devlink_info_version_running_put(req,
>+ DEVLINK_INFO_VERSION_GENERIC_FW,
>+ buf);
>+ if (err)
>+ return err;
>+
>+ return 0;
>+}
>+
>+static const struct devlink_ops prestera_dl_ops = {
>+ .info_get = prestera_dl_info_get,
>+};
>+
>+struct prestera_switch *prestera_devlink_alloc(void)
>+{
>+ struct devlink *dl;
>+
>+ dl = devlink_alloc(&prestera_dl_ops, sizeof(struct prestera_switch));
>+
>+ return devlink_priv(dl);
>+}
>+
>+void prestera_devlink_free(struct prestera_switch *sw)
>+{
>+ struct devlink *dl = priv_to_devlink(sw);
>+
>+ devlink_free(dl);
>+}
>+
>+int prestera_devlink_register(struct prestera_switch *sw)
>+{
>+ struct devlink *dl = priv_to_devlink(sw);
>+ int err;
>+
>+ err = devlink_register(dl, sw->dev->dev);
>+ if (err) {
>+ dev_warn(sw->dev->dev, "devlink_register failed: %d\n", err);
>+ return err;
>+ }
>+
>+ return 0;
>+}
>+
>+void prestera_devlink_unregister(struct prestera_switch *sw)
>+{
>+ struct devlink *dl = priv_to_devlink(sw);
>+
>+ devlink_unregister(dl);
>+}
>+
>+int prestera_devlink_port_register(struct prestera_port *port)
>+{
>+ struct devlink *dl = priv_to_devlink(port->sw);
>+ struct prestera_switch *sw;
>+ int err;
>+
>+ sw = port->sw;
>+ dl = priv_to_devlink(sw);
>+
>+ devlink_port_attrs_set(&port->dl_port, DEVLINK_PORT_FLAVOUR_PHYSICAL,
>+ port->fp_id, false, 0,
>+ &port->sw->id, sizeof(port->sw->id));
>+
>+ err = devlink_port_register(dl, &port->dl_port, port->fp_id);
>+ if (err)
>+ dev_err(sw->dev->dev, "devlink_port_register failed: %d\n", err);
>+
>+ return 0;
>+}
>+
>+void prestera_devlink_port_unregister(struct prestera_port *port)
>+{
>+ devlink_port_unregister(&port->dl_port);
>+}
>+
>+void prestera_devlink_port_type_set(struct prestera_port *port)
>+{
>+ devlink_port_type_eth_set(&port->dl_port, port->dev);
>+}
>+
>+struct devlink_port *prestera_devlink_get_port(struct net_device *dev)
>+{
>+ struct prestera_port *port = netdev_priv(dev);
>+
>+ return &port->dl_port;
>+}
>diff --git a/drivers/net/ethernet/marvell/prestera/prestera_devlink.h b/drivers/net/ethernet/marvell/prestera/prestera_devlink.h
>new file mode 100644
>index 000000000000..b46441d1e758
>--- /dev/null
>+++ b/drivers/net/ethernet/marvell/prestera/prestera_devlink.h
>@@ -0,0 +1,25 @@
>+/* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
>+ *
>+ * Copyright (c) 2019-2020 Marvell International Ltd. All rights reserved.
>+ *
>+ */
>+
>+#ifndef _PRESTERA_DEVLINK_H_
>+#define _PRESTERA_DEVLINK_H_
>+
>+#include "prestera.h"
>+
>+struct prestera_switch *prestera_devlink_alloc(void);
>+void prestera_devlink_free(struct prestera_switch *sw);
>+
>+int prestera_devlink_register(struct prestera_switch *sw);
>+void prestera_devlink_unregister(struct prestera_switch *sw);
>+
>+int prestera_devlink_port_register(struct prestera_port *port);
>+void prestera_devlink_port_unregister(struct prestera_port *port);
>+
>+void prestera_devlink_port_type_set(struct prestera_port *port);
>+
>+struct devlink_port *prestera_devlink_get_port(struct net_device *dev);
>+
>+#endif /* _PRESTERA_DEVLINK_H_ */
>diff --git a/drivers/net/ethernet/marvell/prestera/prestera_main.c b/drivers/net/ethernet/marvell/prestera/prestera_main.c
>index b5241e9b784a..ddab9422fe5e 100644
>--- a/drivers/net/ethernet/marvell/prestera/prestera_main.c
>+++ b/drivers/net/ethernet/marvell/prestera/prestera_main.c
>@@ -14,6 +14,7 @@
> #include "prestera.h"
> #include "prestera_hw.h"
> #include "prestera_rxtx.h"
>+#include "prestera_devlink.h"
>
> #define PRESTERA_MTU_DEFAULT 1536
>
>@@ -185,6 +186,7 @@ static const struct net_device_ops netdev_ops = {
> .ndo_change_mtu = prestera_port_change_mtu,
> .ndo_get_stats64 = prestera_port_get_stats64,
> .ndo_set_mac_address = prestera_port_set_mac_address,
>+ .ndo_get_devlink_port = prestera_devlink_get_port,
> };
>
> static int prestera_port_autoneg_set(struct prestera_port *port, bool enable,
>@@ -234,9 +236,13 @@ static int prestera_port_create(struct prestera_switch *sw, u32 id)
> &port->hw_id, &port->dev_id);
> if (err) {
> dev_err(prestera_dev(sw), "Failed to get port(%u) info\n", id);
>- goto err_port_init;
>+ goto err_port_info_get;
> }
>
>+ err = prestera_devlink_port_register(port);
>+ if (err)
>+ goto err_dl_port_register;
>+
> dev->features |= NETIF_F_NETNS_LOCAL;
> dev->netdev_ops = &netdev_ops;
>
>@@ -295,11 +301,16 @@ static int prestera_port_create(struct prestera_switch *sw, u32 id)
> if (err)
> goto err_register_netdev;
>
>+ prestera_devlink_port_type_set(port);
>+
> return 0;
>
> err_register_netdev:
> list_del_rcu(&port->list);
> err_port_init:
>+ prestera_devlink_port_unregister(port);
>+err_dl_port_register:
>+err_port_info_get:
> free_netdev(dev);
> return err;
> }
>@@ -313,6 +324,7 @@ static void prestera_port_destroy(struct prestera_port *port)
>
You need to call devlink_port_type_clear() before unregister_netdev()
call.
> list_del_rcu(&port->list);
>
>+ prestera_devlink_port_unregister(port);
> free_netdev(dev);
> }
>
>@@ -435,6 +447,10 @@ static int prestera_switch_init(struct prestera_switch *sw)
> if (err)
> return err;
>
>+ err = prestera_devlink_register(sw);
>+ if (err)
>+ goto err_dl_register;
>+
> err = prestera_create_ports(sw);
> if (err)
> goto err_ports_create;
>@@ -442,6 +458,8 @@ static int prestera_switch_init(struct prestera_switch *sw)
> return 0;
>
> err_ports_create:
>+ prestera_devlink_unregister(sw);
>+err_dl_register:
> prestera_event_handlers_unregister(sw);
>
> return err;
>@@ -450,6 +468,7 @@ static int prestera_switch_init(struct prestera_switch *sw)
> static void prestera_switch_fini(struct prestera_switch *sw)
> {
> prestera_destroy_ports(sw);
>+ prestera_devlink_unregister(sw);
> prestera_event_handlers_unregister(sw);
> prestera_rxtx_switch_fini(sw);
> }
>@@ -459,7 +478,7 @@ int prestera_device_register(struct prestera_device *dev)
> struct prestera_switch *sw;
> int err;
>
>- sw = kzalloc(sizeof(*sw), GFP_KERNEL);
>+ sw = prestera_devlink_alloc();
> if (!sw)
> return -ENOMEM;
>
>@@ -468,7 +487,7 @@ int prestera_device_register(struct prestera_device *dev)
>
> err = prestera_switch_init(sw);
> if (err) {
>- kfree(sw);
>+ prestera_devlink_free(sw);
> return err;
> }
>
>@@ -481,7 +500,7 @@ void prestera_device_unregister(struct prestera_device *dev)
> struct prestera_switch *sw = dev->priv;
>
> prestera_switch_fini(sw);
>- kfree(sw);
>+ prestera_devlink_free(sw);
> }
> EXPORT_SYMBOL(prestera_device_unregister);
>
>--
>2.17.1
>
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